Pileus Git - ~andy/linux/blob - sound/soc/sh/rcar/core.c

   1 /*
   2  * Renesas R-Car SRU/SCU/SSIU/SSI support
   3  *
   4  * Copyright (C) 2013 Renesas Solutions Corp.
   5  * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
   6  *
   7  * Based on fsi.c
   8  * Kuninori Morimoto <morimoto.kuninori@renesas.com>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13  */
  14
  15 /*
  16  * Renesas R-Car sound device structure
  17  *
  18  * Gen1
  19  *
  20  * SRU          : Sound Routing Unit
  21  *  - SRC       : Sampling Rate Converter
  22  *  - CMD
  23  *    - CTU     : Channel Count Conversion Unit
  24  *    - MIX     : Mixer
  25  *    - DVC     : Digital Volume and Mute Function
  26  *  - SSI       : Serial Sound Interface
  27  *
  28  * Gen2
  29  *
  30  * SCU          : Sampling Rate Converter Unit
  31  *  - SRC       : Sampling Rate Converter
  32  *  - CMD
  33  *   - CTU      : Channel Count Conversion Unit
  34  *   - MIX      : Mixer
  35  *   - DVC      : Digital Volume and Mute Function
  36  * SSIU         : Serial Sound Interface Unit
  37  *  - SSI       : Serial Sound Interface
  38  */
  39
  40 /*
  41  *      driver data Image
  42  *
  43  * rsnd_priv
  44  *   |
  45  *   | ** this depends on Gen1/Gen2
  46  *   |
  47  *   +- gen
  48  *   |
  49  *   | ** these depend on data path
  50  *   | ** gen and platform data control it
  51  *   |
  52  *   +- rdai[0]
  53  *   |   |               sru     ssiu      ssi
  54  *   |   +- playback -> [mod] -> [mod] -> [mod] -> ...
  55  *   |   |
  56  *   |   |               sru     ssiu      ssi
  57  *   |   +- capture  -> [mod] -> [mod] -> [mod] -> ...
  58  *   |
  59  *   +- rdai[1]
  60  *   |   |               sru     ssiu      ssi
  61  *   |   +- playback -> [mod] -> [mod] -> [mod] -> ...
  62  *   |   |
  63  *   |   |               sru     ssiu      ssi
  64  *   |   +- capture  -> [mod] -> [mod] -> [mod] -> ...
  65  *   ...
  66  *   |
  67  *   | ** these control ssi
  68  *   |
  69  *   +- ssi
  70  *   |  |
  71  *   |  +- ssi[0]
  72  *   |  +- ssi[1]
  73  *   |  +- ssi[2]
  74  *   |  ...
  75  *   |
  76  *   | ** these control scu
  77  *   |
  78  *   +- scu
  79  *      |
  80  *      +- scu[0]
  81  *      +- scu[1]
  82  *      +- scu[2]
  83  *      ...
  84  *
  85  *
  86  * for_each_rsnd_dai(xx, priv, xx)
  87  *  rdai[0] => rdai[1] => rdai[2] => ...
  88  *
  89  * for_each_rsnd_mod(xx, rdai, xx)
  90  *  [mod] => [mod] => [mod] => ...
  91  *
  92  * rsnd_dai_call(xxx, fn )
  93  *  [mod]->fn() -> [mod]->fn() -> [mod]->fn()...
  94  *
  95  */
  96 #include <linux/pm_runtime.h>
  97 #include "rsnd.h"
  98
  99 #define RSND_RATES SNDRV_PCM_RATE_8000_96000
 100 #define RSND_FMTS (SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S16_LE)
 101
 102 /*
 103  *      rsnd_platform functions
 104  */
 105 #define rsnd_platform_call(priv, dai, func, param...)   \
 106         (!(priv->info->func) ? -ENODEV :                \
 107          priv->info->func(param))
 108
 109
 110 /*
 111  *      basic function
 112  */
 113 u32 rsnd_read(struct rsnd_priv *priv,
 114               struct rsnd_mod *mod, enum rsnd_reg reg)
 115 {
 116         void __iomem *base = rsnd_gen_reg_get(priv, mod, reg);
 117
 118         BUG_ON(!base);
 119
 120         return ioread32(base);
 121 }
 122
 123 void rsnd_write(struct rsnd_priv *priv,
 124                 struct rsnd_mod *mod,
 125                 enum rsnd_reg reg, u32 data)
 126 {
 127         void __iomem *base = rsnd_gen_reg_get(priv, mod, reg);
 128         struct device *dev = rsnd_priv_to_dev(priv);
 129
 130         BUG_ON(!base);
 131
 132         dev_dbg(dev, "w %p : %08x\n", base, data);
 133
 134         iowrite32(data, base);
 135 }
 136
 137 void rsnd_bset(struct rsnd_priv *priv, struct rsnd_mod *mod,
 138                enum rsnd_reg reg, u32 mask, u32 data)
 139 {
 140         void __iomem *base = rsnd_gen_reg_get(priv, mod, reg);
 141         struct device *dev = rsnd_priv_to_dev(priv);
 142         u32 val;
 143
 144         BUG_ON(!base);
 145
 146         val = ioread32(base);
 147         val &= ~mask;
 148         val |= data & mask;
 149         iowrite32(val, base);
 150
 151         dev_dbg(dev, "s %p : %08x\n", base, val);
 152 }
 153
 154 /*
 155  *      rsnd_mod functions
 156  */
 157 char *rsnd_mod_name(struct rsnd_mod *mod)
 158 {
 159         if (!mod || !mod->ops)
 160                 return "unknown";
 161
 162         return mod->ops->name;
 163 }
 164
 165 void rsnd_mod_init(struct rsnd_priv *priv,
 166                    struct rsnd_mod *mod,
 167                    struct rsnd_mod_ops *ops,
 168                    int id)
 169 {
 170         mod->priv       = priv;
 171         mod->id         = id;
 172         mod->ops        = ops;
 173         INIT_LIST_HEAD(&mod->list);
 174 }
 175
 176 /*
 177  *      rsnd_dma functions
 178  */
 179 static void rsnd_dma_continue(struct rsnd_dma *dma)
 180 {
 181         /* push next A or B plane */
 182         dma->submit_loop = 1;
 183         schedule_work(&dma->work);
 184 }
 185
 186 void rsnd_dma_start(struct rsnd_dma *dma)
 187 {
 188         /* push both A and B plane*/
 189         dma->submit_loop = 2;
 190         schedule_work(&dma->work);
 191 }
 192
 193 void rsnd_dma_stop(struct rsnd_dma *dma)
 194 {
 195         dma->submit_loop = 0;
 196         cancel_work_sync(&dma->work);
 197         dmaengine_terminate_all(dma->chan);
 198 }
 199
 200 static void rsnd_dma_complete(void *data)
 201 {
 202         struct rsnd_dma *dma = (struct rsnd_dma *)data;
 203         struct rsnd_priv *priv = dma->priv;
 204         unsigned long flags;
 205
 206         rsnd_lock(priv, flags);
 207
 208         dma->complete(dma);
 209
 210         if (dma->submit_loop)
 211                 rsnd_dma_continue(dma);
 212
 213         rsnd_unlock(priv, flags);
 214 }
 215
 216 static void rsnd_dma_do_work(struct work_struct *work)
 217 {
 218         struct rsnd_dma *dma = container_of(work, struct rsnd_dma, work);
 219         struct rsnd_priv *priv = dma->priv;
 220         struct device *dev = rsnd_priv_to_dev(priv);
 221         struct dma_async_tx_descriptor *desc;
 222         dma_addr_t buf;
 223         size_t len;
 224         int i;
 225
 226         for (i = 0; i < dma->submit_loop; i++) {
 227
 228                 if (dma->inquiry(dma, &buf, &len) < 0)
 229                         return;
 230
 231                 desc = dmaengine_prep_slave_single(
 232                         dma->chan, buf, len, dma->dir,
 233                         DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
 234                 if (!desc) {
 235                         dev_err(dev, "dmaengine_prep_slave_sg() fail\n");
 236                         return;
 237                 }
 238
 239                 desc->callback          = rsnd_dma_complete;
 240                 desc->callback_param    = dma;
 241
 242                 if (dmaengine_submit(desc) < 0) {
 243                         dev_err(dev, "dmaengine_submit() fail\n");
 244                         return;
 245                 }
 246
 247         }
 248
 249         dma_async_issue_pending(dma->chan);
 250 }
 251
 252 int rsnd_dma_available(struct rsnd_dma *dma)
 253 {
 254         return !!dma->chan;
 255 }
 256
 257 static bool rsnd_dma_filter(struct dma_chan *chan, void *param)
 258 {
 259         chan->private = param;
 260
 261         return true;
 262 }
 263
 264 int rsnd_dma_init(struct rsnd_priv *priv, struct rsnd_dma *dma,
 265                   int is_play, int id,
 266                   int (*inquiry)(struct rsnd_dma *dma,
 267                                   dma_addr_t *buf, int *len),
 268                   int (*complete)(struct rsnd_dma *dma))
 269 {
 270         struct device *dev = rsnd_priv_to_dev(priv);
 271         dma_cap_mask_t mask;
 272
 273         if (dma->chan) {
 274                 dev_err(dev, "it already has dma channel\n");
 275                 return -EIO;
 276         }
 277
 278         dma_cap_zero(mask);
 279         dma_cap_set(DMA_SLAVE, mask);
 280
 281         dma->slave.shdma_slave.slave_id = id;
 282
 283         dma->chan = dma_request_channel(mask, rsnd_dma_filter,
 284                                         &dma->slave.shdma_slave);
 285         if (!dma->chan) {
 286                 dev_err(dev, "can't get dma channel\n");
 287                 return -EIO;
 288         }
 289
 290         dma->dir = is_play ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
 291         dma->priv = priv;
 292         dma->inquiry = inquiry;
 293         dma->complete = complete;
 294         INIT_WORK(&dma->work, rsnd_dma_do_work);
 295
 296         return 0;
 297 }
 298
 299 void  rsnd_dma_quit(struct rsnd_priv *priv,
 300                     struct rsnd_dma *dma)
 301 {
 302         if (dma->chan)
 303                 dma_release_channel(dma->chan);
 304
 305         dma->chan = NULL;
 306 }
 307
 308 /*
 309  *      rsnd_dai functions
 310  */
 311 #define rsnd_dai_call(rdai, io, fn)                     \
 312 ({                                                      \
 313         struct rsnd_mod *mod, *n;                       \
 314         int ret = 0;                                    \
 315         for_each_rsnd_mod(mod, n, io) {                 \
 316                 ret = rsnd_mod_call(mod, fn, rdai, io); \
 317                 if (ret < 0)                            \
 318                         break;                          \
 319         }                                               \
 320         ret;                                            \
 321 })
 322
 323 int rsnd_dai_connect(struct rsnd_dai *rdai,
 324                      struct rsnd_mod *mod,
 325                      struct rsnd_dai_stream *io)
 326 {
 327         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 328         struct device *dev = rsnd_priv_to_dev(priv);
 329
 330         if (!mod) {
 331                 dev_err(dev, "NULL mod\n");
 332                 return -EIO;
 333         }
 334
 335         if (!list_empty(&mod->list)) {
 336                 dev_err(dev, "%s%d is not empty\n",
 337                         rsnd_mod_name(mod),
 338                         rsnd_mod_id(mod));
 339                 return -EIO;
 340         }
 341
 342         list_add_tail(&mod->list, &io->head);
 343
 344         return 0;
 345 }
 346
 347 int rsnd_dai_disconnect(struct rsnd_mod *mod)
 348 {
 349         list_del_init(&mod->list);
 350
 351         return 0;
 352 }
 353
 354 int rsnd_dai_id(struct rsnd_priv *priv, struct rsnd_dai *rdai)
 355 {
 356         int id = rdai - priv->rdai;
 357
 358         if ((id < 0) || (id >= rsnd_dai_nr(priv)))
 359                 return -EINVAL;
 360
 361         return id;
 362 }
 363
 364 struct rsnd_dai *rsnd_dai_get(struct rsnd_priv *priv, int id)
 365 {
 366         return priv->rdai + id;
 367 }
 368
 369 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
 370 {
 371         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
 372
 373         return rsnd_dai_get(priv, dai->id);
 374 }
 375
 376 int rsnd_dai_is_play(struct rsnd_dai *rdai, struct rsnd_dai_stream *io)
 377 {
 378         return &rdai->playback == io;
 379 }
 380
 381 /*
 382  *      rsnd_soc_dai functions
 383  */
 384 int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional)
 385 {
 386         struct snd_pcm_substream *substream = io->substream;
 387         struct snd_pcm_runtime *runtime = substream->runtime;
 388         int pos = io->byte_pos + additional;
 389
 390         pos %= (runtime->periods * io->byte_per_period);
 391
 392         return pos;
 393 }
 394
 395 void rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte)
 396 {
 397         io->byte_pos += byte;
 398
 399         if (io->byte_pos >= io->next_period_byte) {
 400                 struct snd_pcm_substream *substream = io->substream;
 401                 struct snd_pcm_runtime *runtime = substream->runtime;
 402
 403                 io->period_pos++;
 404                 io->next_period_byte += io->byte_per_period;
 405
 406                 if (io->period_pos >= runtime->periods) {
 407                         io->byte_pos = 0;
 408                         io->period_pos = 0;
 409                         io->next_period_byte = io->byte_per_period;
 410                 }
 411
 412                 snd_pcm_period_elapsed(substream);
 413         }
 414 }
 415
 416 static int rsnd_dai_stream_init(struct rsnd_dai_stream *io,
 417                                 struct snd_pcm_substream *substream)
 418 {
 419         struct snd_pcm_runtime *runtime = substream->runtime;
 420
 421         if (!list_empty(&io->head))
 422                 return -EIO;
 423
 424         INIT_LIST_HEAD(&io->head);
 425         io->substream           = substream;
 426         io->byte_pos            = 0;
 427         io->period_pos          = 0;
 428         io->byte_per_period     = runtime->period_size *
 429                                   runtime->channels *
 430                                   samples_to_bytes(runtime, 1);
 431         io->next_period_byte    = io->byte_per_period;
 432
 433         return 0;
 434 }
 435
 436 static
 437 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream)
 438 {
 439         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 440
 441         return  rtd->cpu_dai;
 442 }
 443
 444 static
 445 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai,
 446                                         struct snd_pcm_substream *substream)
 447 {
 448         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 449                 return &rdai->playback;
 450         else
 451                 return &rdai->capture;
 452 }
 453
 454 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
 455                             struct snd_soc_dai *dai)
 456 {
 457         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
 458         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 459         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 460         struct rsnd_mod *mod = rsnd_ssi_mod_get_frm_dai(priv,
 461                                                 rsnd_dai_id(priv, rdai),
 462                                                 rsnd_dai_is_play(rdai, io));
 463         int ssi_id = rsnd_mod_id(mod);
 464         int ret;
 465         unsigned long flags;
 466
 467         rsnd_lock(priv, flags);
 468
 469         switch (cmd) {
 470         case SNDRV_PCM_TRIGGER_START:
 471                 ret = rsnd_dai_stream_init(io, substream);
 472                 if (ret < 0)
 473                         goto dai_trigger_end;
 474
 475                 ret = rsnd_platform_call(priv, dai, start, ssi_id);
 476                 if (ret < 0)
 477                         goto dai_trigger_end;
 478
 479                 ret = rsnd_gen_path_init(priv, rdai, io);
 480                 if (ret < 0)
 481                         goto dai_trigger_end;
 482
 483                 ret = rsnd_dai_call(rdai, io, init);
 484                 if (ret < 0)
 485                         goto dai_trigger_end;
 486
 487                 ret = rsnd_dai_call(rdai, io, start);
 488                 if (ret < 0)
 489                         goto dai_trigger_end;
 490                 break;
 491         case SNDRV_PCM_TRIGGER_STOP:
 492                 ret = rsnd_dai_call(rdai, io, stop);
 493                 if (ret < 0)
 494                         goto dai_trigger_end;
 495
 496                 ret = rsnd_dai_call(rdai, io, quit);
 497                 if (ret < 0)
 498                         goto dai_trigger_end;
 499
 500                 ret = rsnd_gen_path_exit(priv, rdai, io);
 501                 if (ret < 0)
 502                         goto dai_trigger_end;
 503
 504                 ret = rsnd_platform_call(priv, dai, stop, ssi_id);
 505                 if (ret < 0)
 506                         goto dai_trigger_end;
 507                 break;
 508         default:
 509                 ret = -EINVAL;
 510         }
 511
 512 dai_trigger_end:
 513         rsnd_unlock(priv, flags);
 514
 515         return ret;
 516 }
 517
 518 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 519 {
 520         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 521
 522         /* set master/slave audio interface */
 523         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 524         case SND_SOC_DAIFMT_CBM_CFM:
 525                 rdai->clk_master = 1;
 526                 break;
 527         case SND_SOC_DAIFMT_CBS_CFS:
 528                 rdai->clk_master = 0;
 529                 break;
 530         default:
 531                 return -EINVAL;
 532         }
 533
 534         /* set clock inversion */
 535         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 536         case SND_SOC_DAIFMT_NB_IF:
 537                 rdai->bit_clk_inv = 0;
 538                 rdai->frm_clk_inv = 1;
 539                 break;
 540         case SND_SOC_DAIFMT_IB_NF:
 541                 rdai->bit_clk_inv = 1;
 542                 rdai->frm_clk_inv = 0;
 543                 break;
 544         case SND_SOC_DAIFMT_IB_IF:
 545                 rdai->bit_clk_inv = 1;
 546                 rdai->frm_clk_inv = 1;
 547                 break;
 548         case SND_SOC_DAIFMT_NB_NF:
 549         default:
 550                 rdai->bit_clk_inv = 0;
 551                 rdai->frm_clk_inv = 0;
 552                 break;
 553         }
 554
 555         /* set format */
 556         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 557         case SND_SOC_DAIFMT_I2S:
 558                 rdai->sys_delay = 0;
 559                 rdai->data_alignment = 0;
 560                 break;
 561         case SND_SOC_DAIFMT_LEFT_J:
 562                 rdai->sys_delay = 1;
 563                 rdai->data_alignment = 0;
 564                 break;
 565         case SND_SOC_DAIFMT_RIGHT_J:
 566                 rdai->sys_delay = 1;
 567                 rdai->data_alignment = 1;
 568                 break;
 569         }
 570
 571         return 0;
 572 }
 573
 574 static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
 575         .trigger        = rsnd_soc_dai_trigger,
 576         .set_fmt        = rsnd_soc_dai_set_fmt,
 577 };
 578
 579 static int rsnd_dai_probe(struct platform_device *pdev,
 580                           struct rcar_snd_info *info,
 581                           struct rsnd_priv *priv)
 582 {
 583         struct snd_soc_dai_driver *drv;
 584         struct rsnd_dai *rdai;
 585         struct rsnd_mod *pmod, *cmod;
 586         struct device *dev = rsnd_priv_to_dev(priv);
 587         int dai_nr;
 588         int i;
 589
 590         /* get max dai nr */
 591         for (dai_nr = 0; dai_nr < 32; dai_nr++) {
 592                 pmod = rsnd_ssi_mod_get_frm_dai(priv, dai_nr, 1);
 593                 cmod = rsnd_ssi_mod_get_frm_dai(priv, dai_nr, 0);
 594
 595                 if (!pmod && !cmod)
 596                         break;
 597         }
 598
 599         if (!dai_nr) {
 600                 dev_err(dev, "no dai\n");
 601                 return -EIO;
 602         }
 603
 604         drv  = devm_kzalloc(dev, sizeof(*drv)  * dai_nr, GFP_KERNEL);
 605         rdai = devm_kzalloc(dev, sizeof(*rdai) * dai_nr, GFP_KERNEL);
 606         if (!drv || !rdai) {
 607                 dev_err(dev, "dai allocate failed\n");
 608                 return -ENOMEM;
 609         }
 610
 611         for (i = 0; i < dai_nr; i++) {
 612
 613                 pmod = rsnd_ssi_mod_get_frm_dai(priv, i, 1);
 614                 cmod = rsnd_ssi_mod_get_frm_dai(priv, i, 0);
 615
 616                 /*
 617                  *      init rsnd_dai
 618                  */
 619                 INIT_LIST_HEAD(&rdai[i].playback.head);
 620                 INIT_LIST_HEAD(&rdai[i].capture.head);
 621
 622                 snprintf(rdai[i].name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", i);
 623
 624                 /*
 625                  *      init snd_soc_dai_driver
 626                  */
 627                 drv[i].name     = rdai[i].name;
 628                 drv[i].ops      = &rsnd_soc_dai_ops;
 629                 if (pmod) {
 630                         drv[i].playback.rates           = RSND_RATES;
 631                         drv[i].playback.formats         = RSND_FMTS;
 632                         drv[i].playback.channels_min    = 2;
 633                         drv[i].playback.channels_max    = 2;
 634                 }
 635                 if (cmod) {
 636                         drv[i].capture.rates            = RSND_RATES;
 637                         drv[i].capture.formats          = RSND_FMTS;
 638                         drv[i].capture.channels_min     = 2;
 639                         drv[i].capture.channels_max     = 2;
 640                 }
 641
 642                 dev_dbg(dev, "%s (%s/%s)\n", rdai[i].name,
 643                         pmod ? "play"    : " -- ",
 644                         cmod ? "capture" : "  --   ");
 645         }
 646
 647         priv->dai_nr    = dai_nr;
 648         priv->daidrv    = drv;
 649         priv->rdai      = rdai;
 650
 651         return 0;
 652 }
 653
 654 static void rsnd_dai_remove(struct platform_device *pdev,
 655                           struct rsnd_priv *priv)
 656 {
 657 }
 658
 659 /*
 660  *              pcm ops
 661  */
 662 static struct snd_pcm_hardware rsnd_pcm_hardware = {
 663         .info =         SNDRV_PCM_INFO_INTERLEAVED      |
 664                         SNDRV_PCM_INFO_MMAP             |
 665                         SNDRV_PCM_INFO_MMAP_VALID       |
 666                         SNDRV_PCM_INFO_PAUSE,
 667         .formats                = RSND_FMTS,
 668         .rates                  = RSND_RATES,
 669         .rate_min               = 8000,
 670         .rate_max               = 192000,
 671         .channels_min           = 2,
 672         .channels_max           = 2,
 673         .buffer_bytes_max       = 64 * 1024,
 674         .period_bytes_min       = 32,
 675         .period_bytes_max       = 8192,
 676         .periods_min            = 1,
 677         .periods_max            = 32,
 678         .fifo_size              = 256,
 679 };
 680
 681 static int rsnd_pcm_open(struct snd_pcm_substream *substream)
 682 {
 683         struct snd_pcm_runtime *runtime = substream->runtime;
 684         int ret = 0;
 685
 686         snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);
 687
 688         ret = snd_pcm_hw_constraint_integer(runtime,
 689                                             SNDRV_PCM_HW_PARAM_PERIODS);
 690
 691         return ret;
 692 }
 693
 694 static int rsnd_hw_params(struct snd_pcm_substream *substream,
 695                          struct snd_pcm_hw_params *hw_params)
 696 {
 697         return snd_pcm_lib_malloc_pages(substream,
 698                                         params_buffer_bytes(hw_params));
 699 }
 700
 701 static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
 702 {
 703         struct snd_pcm_runtime *runtime = substream->runtime;
 704         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
 705         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 706         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 707
 708         return bytes_to_frames(runtime, io->byte_pos);
 709 }
 710
 711 static struct snd_pcm_ops rsnd_pcm_ops = {
 712         .open           = rsnd_pcm_open,
 713         .ioctl          = snd_pcm_lib_ioctl,
 714         .hw_params      = rsnd_hw_params,
 715         .hw_free        = snd_pcm_lib_free_pages,
 716         .pointer        = rsnd_pointer,
 717 };
 718
 719 /*
 720  *              snd_soc_platform
 721  */
 722
 723 #define PREALLOC_BUFFER         (32 * 1024)
 724 #define PREALLOC_BUFFER_MAX     (32 * 1024)
 725
 726 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
 727 {
 728         return snd_pcm_lib_preallocate_pages_for_all(
 729                 rtd->pcm,
 730                 SNDRV_DMA_TYPE_DEV,
 731                 rtd->card->snd_card->dev,
 732                 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
 733 }
 734
 735 static void rsnd_pcm_free(struct snd_pcm *pcm)
 736 {
 737         snd_pcm_lib_preallocate_free_for_all(pcm);
 738 }
 739
 740 static struct snd_soc_platform_driver rsnd_soc_platform = {
 741         .ops            = &rsnd_pcm_ops,
 742         .pcm_new        = rsnd_pcm_new,
 743         .pcm_free       = rsnd_pcm_free,
 744 };
 745
 746 static const struct snd_soc_component_driver rsnd_soc_component = {
 747         .name           = "rsnd",
 748 };
 749
 750 /*
 751  *      rsnd probe
 752  */
 753 static int rsnd_probe(struct platform_device *pdev)
 754 {
 755         struct rcar_snd_info *info;
 756         struct rsnd_priv *priv;
 757         struct device *dev = &pdev->dev;
 758         int ret;
 759
 760         info = pdev->dev.platform_data;
 761         if (!info) {
 762                 dev_err(dev, "driver needs R-Car sound information\n");
 763                 return -ENODEV;
 764         }
 765
 766         /*
 767          *      init priv data
 768          */
 769         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 770         if (!priv) {
 771                 dev_err(dev, "priv allocate failed\n");
 772                 return -ENODEV;
 773         }
 774
 775         priv->dev       = dev;
 776         priv->info      = info;
 777         spin_lock_init(&priv->lock);
 778
 779         /*
 780          *      init each module
 781          */
 782         ret = rsnd_gen_probe(pdev, info, priv);
 783         if (ret < 0)
 784                 return ret;
 785
 786         ret = rsnd_scu_probe(pdev, info, priv);
 787         if (ret < 0)
 788                 return ret;
 789
 790         ret = rsnd_adg_probe(pdev, info, priv);
 791         if (ret < 0)
 792                 return ret;
 793
 794         ret = rsnd_ssi_probe(pdev, info, priv);
 795         if (ret < 0)
 796                 return ret;
 797
 798         ret = rsnd_dai_probe(pdev, info, priv);
 799         if (ret < 0)
 800                 return ret;
 801
 802         /*
 803          *      asoc register
 804          */
 805         ret = snd_soc_register_platform(dev, &rsnd_soc_platform);
 806         if (ret < 0) {
 807                 dev_err(dev, "cannot snd soc register\n");
 808                 return ret;
 809         }
 810
 811         ret = snd_soc_register_component(dev, &rsnd_soc_component,
 812                                          priv->daidrv, rsnd_dai_nr(priv));
 813         if (ret < 0) {
 814                 dev_err(dev, "cannot snd dai register\n");
 815                 goto exit_snd_soc;
 816         }
 817
 818         dev_set_drvdata(dev, priv);
 819
 820         pm_runtime_enable(dev);
 821
 822         dev_info(dev, "probed\n");
 823         return ret;
 824
 825 exit_snd_soc:
 826         snd_soc_unregister_platform(dev);
 827
 828         return ret;
 829 }
 830
 831 static int rsnd_remove(struct platform_device *pdev)
 832 {
 833         struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
 834
 835         pm_runtime_disable(&pdev->dev);
 836
 837         /*
 838          *      remove each module
 839          */
 840         rsnd_ssi_remove(pdev, priv);
 841         rsnd_adg_remove(pdev, priv);
 842         rsnd_scu_remove(pdev, priv);
 843         rsnd_dai_remove(pdev, priv);
 844         rsnd_gen_remove(pdev, priv);
 845
 846         return 0;
 847 }
 848
 849 static struct platform_driver rsnd_driver = {
 850         .driver = {
 851                 .name   = "rcar_sound",
 852         },
 853         .probe          = rsnd_probe,
 854         .remove         = rsnd_remove,
 855 };
 856 module_platform_driver(rsnd_driver);
 857
 858 MODULE_LICENSE("GPL");
 859 MODULE_DESCRIPTION("Renesas R-Car audio driver");
 860 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
 861 MODULE_ALIAS("platform:rcar-pcm-audio");